147 years old now in 2026 - what year born?

Today, 28 October 2026 if a person is 147 years old now, what year was he born? See below:

If 147 years old, year of birth is:
1878 or 1879*

*It depends on whether he was born before or after 1 January 1879.

If now 147 years and his year of birth 1878 if he was born after 28 October 1878 until 31 december 1878 inclusively, and his year of birth is 1879 if he was born from 1 January 1879 to 28 October 1879.

Other examples:

If now 7 years, year of birth 2018 or 2019
If now 15 years, year of birth 2010 or 2011
If now 20 years, year of birth 2005 or 2006
If now 55 years, year of birth 1970 or 1971

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